        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 24px;
            background: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            position: relative;
            z-index: 100;
        }

        .nav-left {
            display: flex;
            gap: 24px;
        }

        .nav-item {
            cursor: pointer;
            color: #666;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s;
        }

        .nav-item.active {
            background: #1890ff;
            color: white;
        }

        .nav-item:hover {
            color: #1890ff;
        }

        .nav-item.active:hover {
            background: #40a9ff;
            color: white;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
            cursor: pointer;
        }

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #1890ff url('../assets/images/avatar-placeholder.png') no-repeat center;
            background-size: cover;
        }

        .user-dropdown {
            display: none;
            position: absolute;
            top: 50px;
            right: 0;
            background: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            padding: 16px;
            z-index: 200;
            width: 220px;
        }

        .user-dropdown div {
            margin-bottom: 8px;
        }

        .user-dropdown button {
            width: 100%;
            padding: 8px 16px;
            background: #1890ff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 8px;
        }

        .user-dropdown button:hover {
            background: #40a9ff;
        }

        .upload-avatar {
            text-align: center;
            margin-top: 12px;
        }

        .upload-avatar img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            margin-bottom: 8px;
            object-fit: cover;
        }

        .upload-avatar a {
            color: #1890ff;
            cursor: pointer;
            text-decoration: none;
            font-size: 14px;
        }

        .upload-avatar a:hover {
            text-decoration: underline;
        }

        .change-password-container {
            display: none;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: rgba(0, 0, 0, 0.5);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 300;
        }

        .change-password-form {
            background: #fff;
            padding: 24px;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
            width: 340px;
        }

        .change-password-form div {
            margin-bottom: 16px;
        }

        .change-password-form input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
        }

        .change-password-form button {
            width: 100%;
            padding: 10px 16px;
            background: #1890ff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 8px;
            font-size: 14px;
        }

        .change-password-form button:hover {
            background: #40a9ff;
        }

        .verification-container {
            display: flex;
            align-items: center;
        }

        .verification-container input {
            flex: 1;
            margin-right: 8px;
        }

        .verification-container button {
            width: auto;
            padding: 10px;
            white-space: nowrap;
        }
